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Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop race
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From:
Pavel Machek <pavel@...>
To: Gautham R Shenoy <ego@...>
Cc: Andrew Morton <akpm@...>, Oleg Nesterov <oleg@...>, Rafael J. Wysocki <rjw@...>, <linux-kernel@...>, <mingo@...>, <vatsa@...>, <paulmck@...>
Subject:
Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop race
Date: Saturday, April 21, 2007 - 5:37 am
Hi!
quoted text
> > Of course, running try_to_freeze() in kthread_stop() would be very wrong, > > so we'd actually need to do it in callers, preferably via a new > > kthread_stop_freezeable() wrapper. > > > Well, even then we'll need to ensure that a thread would not call > kthread_stop_freezeable() with any locks held. That would mean more > audits :)
I'll take audits over 200 new lines of code ;-). (And it should be reasonably simple to audit; person doing kthread_stop() -> ktrhread_stop_freezeable() should look after locks). Pavel -- (english)
http://www.livejournal.com/~pavelmachek
(cesky, pictures)
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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Messages in current thread:
[RFC 0/2] Fix Freezer related races.
, Gautham R Shenoy
, (Thu Apr 19, 8:01 am)
[RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop race
, Gautham R Shenoy
, (Thu Apr 19, 8:04 am)
Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r...
, Oleg Nesterov
, (Fri Apr 20, 5:12 pm)
Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r...
, Gautham R Shenoy
, (Mon Apr 23, 6:38 am)
Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r...
, Oleg Nesterov
, (Mon Apr 23, 2:39 pm)
Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r...
, Gautham R Shenoy
, (Mon Apr 23, 4:34 pm)
Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r...
, Andrew Morton
, (Thu Apr 19, 5:31 pm)
Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r...
, Gautham R Shenoy
, (Fri Apr 20, 6:46 am)
Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r...
, Pavel Machek
, (Sat Apr 21, 5:37 am)
Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r...
, Rafael J. Wysocki
, (Fri Apr 20, 4:54 am)
Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r...
, Gautham R Shenoy
, (Fri Apr 20, 7:05 am)
Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r...
, Oleg Nesterov
, (Fri Apr 20, 5:20 pm)
Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r...
, Rafael J. Wysocki
, (Fri Apr 20, 5:45 pm)
Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r...
, Rafael J. Wysocki
, (Fri Apr 20, 7:59 am)
Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r...
, Gautham R Shenoy
, (Fri Apr 20, 8:26 am)
Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r...
, Andrew Morton
, (Fri Apr 20, 1:30 pm)
Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r...
, Ingo Molnar
, (Fri Apr 20, 2:31 pm)
[RFC][PATCH -mm 0/3] Separate freezer flags
, Rafael J. Wysocki
, (Sun Apr 22, 3:28 pm)
[RFC][PATCH -mm 1/3] Separate freezer from PM code
, Rafael J. Wysocki
, (Sun Apr 22, 3:33 pm)
Re: [RFC][PATCH -mm 1/3] Separate freezer from PM code
, Pavel Machek
, (Mon Apr 23, 6:41 am)
[RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Rafael J. Wysocki
, (Sun Apr 22, 3:39 pm)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Oleg Nesterov
, (Mon Apr 23, 6:23 pm)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Rafael J. Wysocki
, (Mon Apr 23, 6:40 pm)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Oleg Nesterov
, (Mon Apr 23, 6:55 pm)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Rafael J. Wysocki
, (Mon Apr 23, 7:10 pm)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Oleg Nesterov
, (Mon Apr 23, 7:19 pm)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Rafael J. Wysocki
, (Tue Apr 24, 7:32 am)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Gautham R Shenoy
, (Mon Apr 23, 6:41 pm)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Rafael J. Wysocki
, (Mon Apr 23, 6:55 pm)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Gautham R Shenoy
, (Mon Apr 23, 9:17 am)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Rafael J. Wysocki
, (Mon Apr 23, 3:57 pm)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Pavel Machek
, (Mon Apr 23, 6:50 am)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Satyam Sharma
, (Mon Apr 23, 12:09 am)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Rafael J. Wysocki
, (Mon Apr 23, 3:06 pm)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Gautham R Shenoy
, (Mon Apr 23, 10:19 am)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Rafael J. Wysocki
, (Mon Apr 23, 2:49 pm)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Paul Jackson
, (Sun Apr 22, 5:14 pm)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Rafael J. Wysocki
, (Sun Apr 22, 6:14 pm)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Paul Jackson
, (Sun Apr 22, 6:31 pm)
Re: [RFC][PATCH -mm 2/3] freezer: Introduce freezer_flags
, Satyam Sharma
, (Sun Apr 22, 11:18 pm)
[RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_stop
, Rafael J. Wysocki
, (Sun Apr 22, 3:40 pm)
Re: [RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_s...
, Gautham R Shenoy
, (Mon Apr 23, 8:35 am)
Re: [RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_s...
, Rafael J. Wysocki
, (Mon Apr 23, 3:55 pm)
Re: [RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_s...
, Oleg Nesterov
, (Mon Apr 23, 4:46 pm)
Re: [RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_s...
, Gautham R Shenoy
, (Mon Apr 23, 5:16 pm)
Re: [RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_s...
, Rafael J. Wysocki
, (Mon Apr 23, 5:30 pm)
Re: [RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_s...
, Oleg Nesterov
, (Mon Apr 23, 3:03 pm)
Re: [RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_s...
, Rafael J. Wysocki
, (Mon Apr 23, 4:05 pm)
Re: [RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_s...
, Pavel Machek
, (Mon Apr 23, 6:40 am)
Re: [RFC][PATCH -mm 3/3] freezer: Fix problem with kthread_s...
, Rafael J. Wysocki
, (Mon Apr 23, 3:50 pm)
Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r...
, Rafael J. Wysocki
, (Fri Apr 20, 5:13 pm)
Re: [RFC PATCH(experimental) 2/2] Fix freezer-kthread_stop r...
, Rafael J. Wysocki
, (Fri Apr 20, 8:50 am)
[RFC PATCH 1/2] Fix PF_NOFREEZE and freezeable race
, Gautham R Shenoy
, (Thu Apr 19, 8:02 am)
Re: [RFC PATCH 1/2] Fix PF_NOFREEZE and freezeable race
, Rafael J. Wysocki
, (Thu Apr 19, 5:39 pm)
Re: [RFC PATCH 1/2] Fix PF_NOFREEZE and freezeable race
, Oleg Nesterov
, (Fri Apr 20, 2:02 pm)
Re: [RFC PATCH 1/2] Fix PF_NOFREEZE and freezeable race
, Gautham R Shenoy
, (Mon Apr 23, 6:26 am)
Re: [RFC PATCH 1/2] Fix PF_NOFREEZE and freezeable race
, Oleg Nesterov
, (Mon Apr 23, 1:49 pm)
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